Heterosexual behaviors and factors that influence condom use among patients attending a sexually transmitted disease clinic--United States.
D000293:Adolescent; D000328:Adult; D003275:Contraceptive Devices, Male / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012495:San Francisco; D012725:Sexual Behavior